Question about SCBCD study guide

[Gemini Moses]

I am reading SCBCD study guide at
http://java.boot.by/bcd-guide/ch01s03.html

In the first chapter page 3 --
Identify correct and incorrect statements or examples about EJB programming restrictions. -
second last point is
The enterprise bean must not attempt to define a class in a package.

I am not getting what is this point?
Dont we create bean in a packge same as where home and object beans are created.

Thanks!

[Keerthi P]

It means that the defineXYZ() methods must not be used from java.lang.ClassLoader